How many standard drinks are in a glass of champagne?
A champagne toast feels light and celebratory — a glass or two of bubbles hardly counts, right? In fact a 750ml bottle of champagne or sparkling wine holds about 7 Australian standard drinks, and a topped-up flute is comfortably more than one. Here's the simple formula, a table by type of bubbly, and why sparkling is so easy to underestimate.
The short answer
A standard 750ml bottle of champagne at the typical strength of 12% ABV contains roughly 7.1 standard drinks. Prosecco, usually a touch lighter at around 11%, comes in near 6.5, while a sparkling wine at 13% is close to 7.7. Either way, one bottle is well beyond a single day's worth of drinking under the Australian guidelines.
Sparkling wine sits right alongside still wine on alcohol content — it is not a "lighter" drink. The reason it slips past people is the serve: small flutes, constant top-ups and a celebratory mood that makes the count easy to lose.
What counts as one standard drink of sparkling?
An Australian standard drink contains 10 grams of pure alcohol, no matter what glass it comes in. The Alcohol and Drug Foundation defines it as a fixed unit of alcohol, and the national standard-drink guide lists one standard drink of sparkling wine as about 100ml at 13% ABV.
That 100ml is the catch. A champagne flute is usually poured smaller than a wine glass, so people assume a flute must be well under a standard drink — but a full or topped-up flute is often 125–150ml, which lands you at or above one standard drink per glass. The ADF makes the same point about wine: one serve is usually more than one standard drink.
The formula (the same one for every drink)
You can work out the standard drinks in any sparkling — champagne, prosecco, cava or an Aussie sparkling — with a single line of maths:
For a 750ml bottle of champagne at 12% ABV: 0.75 × 12 × 0.789 = 7.1 standard drinks.
The 0.789 is the specific gravity of ethanol — the weight of one litre of pure alcohol in kilograms. It converts the volume of alcohol into its weight, so the answer matches the 10-grams-per-standard-drink rule. You only need the two numbers already on the label: how much liquid, and how strong.
Standard drinks by type of bubbly
Sparkling wines vary a little in strength. Champagne must be at least 11% ABV and usually sits at 12–12.5%. Prosecco is typically around 11%, cava around 11.5%, and many Australian sparklings land near 12–13%. Here's how a full 750ml bottle compares:
| Sparkling (750ml bottle) | Typical ABV | Standard drinks |
|---|---|---|
| Prosecco | ~11% | ~6.5 |
| Cava | ~11.5% | ~6.8 |
| Champagne | ~12% | ~7.1 |
| Champagne / premium sparkling | ~12.5% | ~7.4 |
| Australian sparkling / sparkling shiraz | ~13% | ~7.7 |
Even the lightest bottle of prosecco is more than six standard drinks. The differences between styles are smaller than the differences in how much people actually pour and how quickly the glass gets refilled.
Why a flute is more than one standard drink
Tradition says a 750ml bottle pours "six glasses" — which works out to about 125ml a flute. At champagne strength, that's already close to 1.2 standard drinks, not the "half a drink" a small flute suggests. Pour a more generous celebration glass and the number climbs:
| Pour | Size | Standard drinks (~12% sparkling) |
|---|---|---|
| Standard drink measure | 100ml | ~0.9 |
| Traditional flute (6 per bottle) | 125ml | ~1.2 |
| Generous celebration pour | 150ml | ~1.4 |
| Full coupe / big pour | 175ml | ~1.7 |
The bigger problem with bubbly is the top-up. Unlike a beer or a measured spirit, a flute is rarely emptied before someone refills it, so it's almost impossible to know how many glasses you've actually had. Four "glasses" across a long lunch can easily be five or six standard drinks — most of a bottle — without a single empty glass to count.
Do the bubbles really get you drunk faster?
There's a long-standing belief that champagne "goes straight to your head". Glass for glass it contains about the same alcohol as still wine, so it doesn't deliver more alcohol — but there is some evidence the bubbles change the timing. Small studies have found carbonation can speed up how quickly alcohol is absorbed, so you may feel the effect a little sooner.
The evidence is modest and mixed. In one small champagne trial of 21 people, bubbly champagne was absorbed a bit faster than flat champagne — but around a third of the participants showed no difference at all. The takeaway is sensible caution, not alarm: sparkling can creep up on you faster, especially on an empty stomach at the start of an event, so it pays to pace it and not treat the first few glasses as "free".
How a bottle compares to the guidelines
The National Health and Medical Research Council (NHMRC) advises healthy adults to drink no more than 10 standard drinks a week and no more than 4 on any one day, to reduce the risk of harm from alcohol.
Set a bottle of bubbly against that:
- One 750ml bottle ≈ 7 standard drinks — nearly double the recommended daily maximum of 4.
- That single bottle is around 70% of the entire weekly limit of 10.
- Share a bottle between two over dinner and you're each at roughly 3.5 standard drinks — close to the daily guideline before any other drinks.
The Alcohol and Drug Foundation stresses these are guidelines for reducing risk, not targets — and that the less you choose to drink, the lower your long-term risk of alcohol-related harm.
Keeping count when the glass never empties
The maths is easy; the tracking is the hard part, because a topped-up flute defeats the usual "count your empties" trick. A couple of habits help: pour your own so you know the size, and mentally tick over a standard drink for roughly every glass rather than assuming a flute is less than one.
That's exactly what the Drink Buddy app takes off your hands. Log each glass of sparkling and it keeps a running tally of your standard drinks, estimates your blood alcohol concentration in real time, and runs a live sobriety timer counting down to zero — so a celebratory bottle never quietly turns into more than you planned. For weddings and long events, our guide to pacing your drinks at a wedding pairs neatly with it.
Frequently asked questions
How many standard drinks are in a bottle of champagne?
About 7. At the typical 12% ABV, a 750ml bottle is around 7.1 standard drinks (0.75 × 12 × 0.789). A 13% sparkling is closer to 7.7.
How many standard drinks are in a glass of champagne?
A traditional 125ml flute at 12% is about 1.2 standard drinks, and a generous 150ml pour is around 1.4. A flute is usually a little more than one standard drink, not less.
Does champagne get you drunk faster than wine?
It has a similar alcohol content to wine, so no extra alcohol — but small studies suggest the bubbles can speed up absorption, so you may feel it sooner. The effect is modest and doesn't apply to everyone.
How many standard drinks are in a bottle of prosecco?
Prosecco is usually around 11% ABV, so a 750ml bottle is about 6.5 standard drinks — still well over the daily guideline of 4.
Is champagne stronger than wine?
No. Champagne is typically 12–12.5%, close to or slightly below a typical still wine at 13–14%. It can feel stronger because of the bubbles, but holds a similar amount of alcohol.